Little Sparkles

[glorybound]

I'm zoomed way in, but I'm seeing little sparkles. My settings are already high. What should I be looking at to get rid of these?

[Deflaminis]

I get these too. Searching the forums will list a few different potential fixes for it, but sub pixel mapping seems and/or clamping seems to work best. Other options are turning off the Sun's visibility as well as using an AA filter than handles this like blend.

[windrockwater]

I see those alot too. Usually when using an HDRI light setup. Interested to hear how you solve it...

[Dariusz Makowski (Dadal)]

U talking about the white dots?

[glorybound]

yes. The little white dots

[Dariusz Makowski (Dadal)]

Id troubleshoot it like that

Apply grey shader - I assume u use displacement keep it.

Render with grey shader no GI
if no speckles, render again with GI
if speckles - disable caustic in GI - if that didnt help then
disable dispalcement and use bump - see if speckles stay...

and so on...

[glorybound]

I'll try your suggestions.

[jacksc02]

Looks like you are using "use light cache for glossy rays"
Increasing the light cache subdivs/sample size can clear this

[BKE]

Looks like you are using "use light cache for glossy rays"
Increasing the light cache subdivs/sample size can clear this

Bobby: I stopped using HDRI's as my light source because of the white dots. I now just use my nice HDRI's for environments, and use the VRAY SUN. Based on Vlado's comment above, he seems to like HDRI's. Did you find a solution? Did DADAL's suggestion help, or Chris's? Thanks.

[vlado]

These are usually glossy reflections of glossy reflections (or specular hilights) that reflect the HDRI; we are thinking about some automatic work-arounds for these cases, but still if you can get me the scene to vlado@chaosgroup.com it will help to figure out what's going on.

Best regards,
Vlado

[Deflaminis]

Bobby: I stopped using HDRI's as my light source because of the white dots. I now just use my nice HDRI's for environments, and use the VRAY SUN. Based on Vlado's comment above, he seems to like HDRI's. Did you find a solution? Did DADAL's suggestion help, or Chris's? Thanks.

I've been using the following work around: use the full res normal HDRI for reflections, and a lower res blurred version for lighting. Usually solves the problem for me, but not always.

[BKE]

I've been using the following work around: use the full res normal HDRI for reflections, and a lower res blurred version for lighting. Usually solves the problem for me, but not always.

Thanks. Nice workaround. May I ask.. when it does not work to use the blurry HDRI, do you have to resort to increasing the settings? I would like to go back to using HDRI's if I can be confident that they will work.

[Deflaminis]

You know, I haven't fully nailed down what causes my problems when they do arise. But I suspect it's somehow related to the HDRI going through glass to light up a scene. (Interiors get the problem a lot more than exteriors for me.) Wish I had a better answer for you.

[BKE]

You know, I haven't fully nailed down what causes my problems when they do arise. But I suspect it's somehow related to the HDRI going through glass to light up a scene. (Interiors get the problem a lot more than exteriors for me.) Wish I had a better answer for you.

Thanks. That actually helps a lot! I have already run into issues caused by glass, and, while I do not like it, I have turned the glass off for interiors. Knowing that I can consistently get good exteriors from a blurred HDRI is enough info for me to give it another try. Do you have a rule of thumb for the threshhold for the resolution to eliminate the speckles?

[Neilg]

I've found that putting the hdri into a domelight and checking on 'store with irradiance map' solves this for me.